"People are, unsurprisingly, upset that Microsoft have imposed UEFI Secure Boot on the x86 market. A situation in which one company gets to determine which software will boot on systems by default is obviously open to abuse. What's more surprising is that many of the people who are upset about this are completely fine with encouraging people to buy Chromebooks. Out of the box, Chromebooks are even more locked down than Windows 8 machines." Good point.

All the Windows 8 certified systems (including cheap ones) that I've looked at implement key management, either through an explicit UI or via returning the system to Setup Mode. You're the one claiming that the majority of manufacturers will ignore this requirement. If so, you should be able to buy pretty much any cheap Windows 8 certified motherboard and prove that it doesn't have this functionality. How about this: pick a random Windows 8 certified board off Newegg and link it here. Buy it and test it. If there's no way to install your own keys, I'll pay for it.